30 minutes before draft time a very obvious link will appear on the league page above the list of teams and it will say "Your league is drafting now - enter live draft". You click that. Then another window will open up. Across the top of the page you'll see 12 flags in a horizontal row, if you put your mouse arrow on each flag, it will have the random team name that drafts in that spot. The flag that is drafting will be lit up in red.

Next thing down on the page will be Yahoo's list of O-ranked players. To draft a player, put your mouse arrow on his name and left click once, then to the lower right of the list click "draft player". Be very careful here that the correct player's name is lit up.

The 1:30 goes really fast when it's your turn, so you kinda gotta move quick, because if you don't pick your player, Yahoo will just give you the highest ranked player available according to their rankings (which can be very screwed up) unless your preranked their list, regardless of what positions you need.